Borderou de evaluare (job #498087)

Compilare: user.cpp: In function 'int main()': user.cpp:59:21: warning: converting to non-pointer type 'int' from NULL [-Wconversion-null] user.cpp:69:17: warning: NULL used in arithmetic [-Wpointer-arith] user.cpp:69:30: warning: NULL used in arithmetic [-Wpointer-arith] user.cpp:69:43: warning: NULL used in arithmetic [-Wpointer-arith] user.cpp:51:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:52:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:54:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:60:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]